Conditions for Clearing the DTC

The DTC becomes history when then conditions for setting the DTC are no longer present.
The history DTC is cleared after 40 malfunction free warm-up cycles.
The PCM receives the clear code command from the scan tool.

Fig 1: DTC P1189 Diagnostic Table (1 Of 2)
Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P1189 Diagnostic Table (2 Of 2)
Courtesy of GENERAL MOTORS CORP.